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Published VersionCC BY V4.0, Open Access
Conference paper
Investigation of Factors Affecting Corrosion Mechanisms in Latent Heat Thermal Energy Storage Systems
SolarPACES Conference Proceedings, 2, pp.1-10
SolarPACES: International Conference on Concentrating Solar Power and Chemical Energy Systems, 29th (Sydney, Australia, 10-Oct-2023–13-Oct-2023)
TIB Open Publishing
2024
Abstract
Concentrated Solar Power (CSP) plants integrated with Latent Heat Thermal Energy Storage (LHTES) systems offer a promising solution for dispatchability, reliability, and economic con-cerns generally associated with renewable energy technologies. These systems, however, re-quire an operational life of up to 30 years to compete with power plant systems operating on fossil fuels. This is a significant challenge due to the high temperatures and corrosive eutectic salts utilised in LHTES systems. Additionally, these systems and its subcomponents are ex-pected to be under varying degrees of stress due to the diurnal cyclic temperature variations inherent in the plant’s operational cycle. Hence, it is crucial to understand the various factors that can affect the operational life of materials used in such applications and conduct thorough material compatibility studies to assess the combined impact of these operating conditions on corrosion mechanisms. This study presents a novel static immersion test approach using mod-ified Compact Tension (CT) specimens manufactured from 316L to investigate the effects of Na2CO3:NaCl (59.45:40.55 wt.%) salt, elevated temperatures (700 ℃ for up to 1000 hours), and stress on corrosion induced in the alloy. The post-exposure results are characterised with Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) shows that corrosion mechanisms are significantly affected by factors such as high operating temperatures leading to changes in both corrosion morphology and rate, high stresses causing localised preferential corrosion, as well as corrosive salt and oxygen availability affecting the type of corrosion induced.
Details
- Title
- Investigation of Factors Affecting Corrosion Mechanisms in Latent Heat Thermal Energy Storage Systems
- Authors
- Gaurav Vithalani (Corresponding Author) - Queensland University of TechnologyStuart Bell - Queensland University of TechnologyGeoffrey Will - University of the Sunshine Coast, Queensland, School of Science, Technology and EngineeringTheodore A. Steinberg - Queensland University of TechnologyRichard E. Clegg - Explicom Engineering InvestigatorsRezwanul Haque - University of the Sunshine Coast, Queensland, School of Science, Technology and Engineering
- Publication details
- SolarPACES Conference Proceedings, 2, pp.1-10
- Conference details
- SolarPACES: International Conference on Concentrating Solar Power and Chemical Energy Systems, 29th (Sydney, Australia, 10-Oct-2023–13-Oct-2023)
- Publisher
- TIB Open Publishing
- Date published
- 2024
- DOI
- 10.52825/solarpaces.v2i.880
- ISSN
- 2751-9899
- Copyright note
- (c) 2024 Gaurav Vithalani, Stuart Bell, Geoffrey Will, Theodore A. Steinberg, Richard Clegg, Rezwanul Haque. This work is licensed under a Creative Commons Attribution 4.0 International License.
- Data Availability
- Data utilised to acquire the results in this study will be made available upon reasonable request.
- Organisation Unit
- School of Science, Technology and Engineering
- Language
- English
- Record Identifier
- 991035898902621
- Output Type
- Conference paper
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